A walkthrough, end to end.
- 1
Enter two binary numbers (only digits 0 and 1).
- 2
Pick add, subtract, multiply, or divide.
- 3
See the result in binary plus decimal, octal, and hex.
Binary arithmetic
Base-2 numbers use only 0 and 1. Each position is a power of 2. Arithmetic follows the same rules as decimal but with carry/borrow at 2.
What you can do with this.
Binary to decimal homework
Quickly verify conversions like 11010₂ = 26₁₀ or 1111111₂ = 127₁₀.
Bit-pattern checks
Inspect flags or masks by converting hex constants to binary and back.
Programming references
Convert between bases when reading hardware datasheets or memory dumps.
Teaching binary
Show students how place value works in base 2 vs. base 10.
Hex color quick check
Convert FF to 11111111 to see why it's the maximum byte value.
Subnet math
Compute network masks by ANDing IP addresses in binary.
Verifying bitwise ops
Cross-check results from your code with simple binary arithmetic.
Binary calculator 2026 — what's current
Foundational concept; AI tools handle conversions, but a calculator wins for instant verification.
Frequently asked.
Only 0 and 1. Spaces are ignored.
Inputs are non-negative integers; subtraction can produce a signed decimal result.
This calculator works on whole numbers. Use the basic calculator for decimal arithmetic.
No. All calculations run in your browser.